Domino

The puzzle's title "Domino" is quite misleading.
The prompt here reads "Close your eyes, look first to the skies."
From this, one can suppose that the cards held up by the magician in the puzzle each represent a letter in Braille, spelling:
ABLANK
The skywriting [1] which corresponds to this puzzle is another series of (somewhat hard-to-read) Braille letters which reads:
DRAWING
The answer is: DRAWING A BLANK